616591994 has 8 divisors (see below), whose sum is σ = 933532128. Its totient is φ = 305414620.

The previous prime is 616591957. The next prime is 616592017. The reversal of 616591994 is 499195616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440422 + ... + 1440849.

It is an arithmetic number, because the mean of its divisors is an integer number (116691516).

Almost surely, 2^616591994 is an apocalyptic number.

616591994 is a deficient number, since it is larger than the sum of its proper divisors (316940134).

616591994 is a wasteful number, since it uses less digits than its factorization.

616591994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881380.

The product of its digits is 524880, while the sum is 50.

The square root of 616591994 is about 24831.2704870291. The cubic root of 616591994 is about 851.1366541986.

The spelling of 616591994 in words is "six hundred sixteen million, five hundred ninety-one thousand, nine hundred ninety-four".